By the time the main road rejoins the fence toward Playas de Tijuana, the work of taggers can be seen on the fence. The protest art becomes visible again in Playas, where the fence extends into the ocean.

Over the years, there have been a series of installations on the south side of the fence, including a large painting of a skeleton drinking the last drop of water from a water jug and a traditional Mexican altar for the dead. Three paintings of “doors” — the only open one leading into a depiction of the desert — from a few years ago are still in place, the work of Yamagata and San Diego artist Todd Stands.

Most prominent is another cross-themed work, this one a massive cluster. Yamagata and Schnorr collaborated on it with Smith and with the Coalición Pro Defensa del Migrante, a Tijuana-based migrant aid organization. Hung from the fence near the beach are 5,100 white crosses, symbolizing the estimated number of border-crossing deaths in the past 15 years, strung together and draped from the top.

The display took six months to put together, said Esmeralda Siu, director of the migrant coalition. Volunteers, including the residents of a Tijuana migrant shelter, did much of the work of constructing and stringing the crosses together. They were installed Oct. 30, in time for Mexico’s traditional Day of the Dead holiday Nov. 2.

Swaying gently in the breeze, the crosses had a powerful effect on Silvia Urieta, 41, in Tijuana visiting relatives for the week.

“Imagine, how many people,” said Urieta, who lives in Ixtapa-Zihuatanejo, on the coast of Guerrero state. “I took photos so that my paisanos could see it.”

The installation was a sobering sight for the family as they posed for photos, otherwise merrily, by the 1851 marble monument marking the border.

“Those who come from the south, they get the wrong idea,” said Urieta’s brother-in-law Adrian Pineda, 35, a native of Tijuana. “They think it’s easy. But here is how easy it is. For many, the dream they have ends in a cross.”